Nice little piece of white opalescent glass with raised block pattern. I believe this is probably a jam or mustard pot without a lid, turn of the century vintage.
It holds a votive candle very nicely! And it would easily hold toothpicks, matches, even cotton swabs as you can see.
It's not marked that I could find - Beatty? Fenton? Imperial? Condition in very good, no chips or damage.